JP4633583B2 - Unlocking mechanism for vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat unlocking operation mechanism. Specifically, the vehicle seat has a reclining mechanism for adjusting the inclination angle of the seat back serving as a backrest portion, and a lock mechanism for locking the seat to an engagement member installed on the vehicle floor. And a mechanism for unlocking the vehicle seat that can be switched to a released state by an operation accompanying a series of releasing operations of one operating member.

  Conventionally, for example, a rear seat of a vehicle is provided with a storage mechanism that can be put into a stored state by flipping up or dropping the seat when not in use in a folded posture state in the vehicle front-rear direction or the vehicle width direction. There is something that has been. As this storage mechanism, for example, a technique disclosed in Patent Document 1 is known. In this disclosure, reclining mechanisms for adjusting the inclination angle of the seat back are provided on both the left and right sides of the seat, respectively. Further, a lock mechanism for locking the seat to a striker installed on the vehicle floor is provided at the lower portion of the seat cushion. The reclining mechanism and the lock mechanism are respectively connected to operation cables for individually locking and releasing them. Further, both the cables are connected to one release lever (operation member). Thus, both the reclining mechanism and the lock mechanism can be switched to the released state by operating one release lever. Further, in this disclosure, by operating the release lever, first, only the operation cable connected to the reclining mechanism is pulled, and then the operation cable connected to the lock mechanism is also pulled together. Is set. Therefore, when the release lever is operated, first, only the reclining mechanism is switched to the release state, and the seat back is folded to the seat cushion side. Then, by further operating the release lever, the lock mechanism is then switched to the release state. As a result, the sheet in the folded posture state is flipped up or dropped in a predetermined direction to be in a stored state. In addition, for example, by stopping the operation of the release lever to a halfway position, only the reclining mechanism can be switched to the release state, and the seat can be kept in a halfway state in which the seat is folded on the vehicle floor.

Japanese Patent No. 2951878

  However, in the above-described conventional technique, both the reclining mechanism and the lock mechanism can be switched to the released state by operating one release lever (operation member), but at the same time, the operation cables are pulled to perform the operation. Therefore, there is a problem that such an operation load becomes large.

  The present invention was devised to solve the above-described problems, and the problem to be solved by the present invention is to release both the reclining mechanism and the lock mechanism by releasing the operation member. In the unlocking operation mechanism that can be switched, the operation force required for the operation member is reduced.

In order to solve the above problems, the vehicle seat unlocking operation mechanism of the present invention takes the following means.
First, according to a first aspect of the present invention, a seat of a vehicle is engaged and locked with a reclining mechanism for adjusting a tilt angle of a seat back serving as a backrest portion and an engagement member installed on the vehicle floor. A mechanism for unlocking the vehicle seat, wherein both mechanisms can be switched to a released state by an operation associated with a series of releasing operations of one operating member, the operating member releasing operation An operating arm that swings with the first arm, a first driven arm that is pushed by the swinging operating arm and swings to switch the reclining mechanism to a released state, and an operating arm that swings separately from the first driven arm And a second driven arm that switches the lock mechanism to a released state by being swung and being swung, and the second driven arm swings the operating arm in response to the releasing operation of the operating member. By the swing angle of the direction to reach the angular position disengaged from the abutment by pushing on the first driven arm, it is what is arranged to be pushed against the operating arm those.
According to the first aspect of the invention, when the operation member is released, first, the operation arm comes into contact with the first driven arm and pushes it. As a result, the first driven arm swings to switch the reclining mechanism to the released state. When the operation arm is further swung, the operation arm is removed from the contact state by the pushing to the first driven arm, and then comes into contact with the second driven arm to push it. As a result, the second driven arm swings to switch the lock mechanism to the released state. In other words, when the operation member is released, the first driven arm and the second driven arm are sequentially pushed separately, and the reclining mechanism and the lock mechanism are switched to the released state. Note that by stopping the release operation of the operation member to the operation position where the reclining mechanism is switched to the release state, for example, the seat can be kept in a folded posture on the vehicle floor.

Next, in a second aspect based on the first aspect described above, the operating arm is biased by a biasing means that biases the operating arm toward the initial position before the operation member is released. In the initial position state, the first stop arm is in the rotation stop state. When the first driven arm is not in contact with the swinging operation arm, the initial position state before the first driven arm is pushed by the operation arm. The first follower arm is pivotally biased by the biasing means that biases the actuator arm toward the head and is in a rotation stop state in the initial position. It is considered to be greater than the energizing power.
According to the second aspect of the invention, when the first driven arm is removed from the contact state due to the pushing of the operating arm, the first driven arm is returned to the initial position before being pushed by the operating arm. Thereby, the pushing position relationship between the operation arm and the first driven arm is reversed. However, this reverse pushing position relationship is such that the operation arm is overwhelmed with the urging force of the first driven arm by pushing the release operation of the operating member, while pushing from the reverse direction. Therefore, it is returned to the pushing position relationship before the reverse rotation.

Next, according to a third aspect of the present invention, in the first or second aspect described above, the swing angle position at which the reclining mechanism of the first driven arm is switched to the release state and the swing state in which the contact state by the pushing of the operating arm is released. An area for keeping the reclining mechanism in a released state is set between the moving angle position.
According to the third aspect of the present invention, in the swing angle region where the region for keeping the reclining mechanism in the released state is set, this state is maintained even if the swing angle advances as the reclining mechanism is switched to the released state. Is maintained.

The present invention can obtain the following effects by taking the above-described means.
First, according to the first aspect of the invention, in the unlocking operation mechanism that can switch both the reclining mechanism and the locking mechanism to the unlocked state by performing the releasing operation of the operating member, the operating force required for the operating member is reduced. be able to. Furthermore, the operation of releasing the operation member can be used to place the seat in a folded posture on the vehicle floor, and the functions can be used properly.
Furthermore, according to the second invention, by stopping the release operation of the operation member, the reversely pushed position relationship between the operation arm and the first driven arm can be suitably returned to the initial position state before the reverse rotation. it can.
Furthermore, according to the third aspect of the invention, for example, it is possible to prevent an erroneous operation such that the contact state between the operation arm and the first driven arm is released before the reclining mechanism is switched to the release state. Further, the operation of releasing the operation member makes it easy to create a state in which only the reclining mechanism is switched to the released state, and also makes it easy to perform an operation of holding the reclining mechanism so as not to return to the locked state.

  Embodiments of the best mode for carrying out the present invention will be described below with reference to the drawings.

  First, the vehicle seat unlocking operation mechanism (hereinafter referred to as the unlocking operation mechanism) as Example 1 will be described with reference to FIGS. FIG. 1 is a schematic diagram showing a schematic configuration of a vehicle seat unlocking operation mechanism, FIG. 2 is an enlarged schematic diagram of a portion A in FIG. 1, and FIG. 3 is a diagram of the first driven arm 20 from the state of FIG. FIG. 4 is a schematic view showing a state in which the operating arm 10 is pushed and swung, and FIG. 4 is a state in which the operating arm 10 is pushed from the state of FIG. FIG. 5 is a schematic diagram showing a state in which the operation arm 10 is in contact with the second driven arm 30 from the state of FIG. 4, and FIG. 6 is a diagram showing the operation of the second driven arm 30 from the state of FIG. 3 is a schematic diagram illustrating a state where the arm 10 is pushed to swing and rotate. FIG. 7 is a side view showing a schematic configuration of the reclining mechanism 40, FIG. 8 is a side view showing an operating state of the reclining mechanism 40 corresponding to FIG. 3, and FIG. 9 is an operation of the reclining mechanism 40 corresponding to FIG. It is a side view showing a state. 10 is a side view showing a schematic configuration of the lock mechanism 50, FIG. 11 is a side view showing an operating state of the lock mechanism 50 corresponding to FIG. 6, and FIG. 12 shows a lockable state of the lock mechanism 50. It is a side view. FIG. 13 is a side view showing a state in which the seat 1 is in a folded posture. In FIG. 13, the front side in the drawing is represented as the vehicle inner side.

The seat 1 of this embodiment is applied as a rear seat of a vehicle. As shown in FIG. 13, the seat 1 includes a reclining mechanism 40 that connects and supports a seat back 2 serving as a backrest portion so as to be tiltable with respect to a seat cushion 3 serving as a seating portion, and the seat 1 on the vehicle floor F. And a lock mechanism 50 for engaging and locking the striker T installed in the. Here, the striker T corresponds to the engaging member of the present invention.
The former reclining mechanism 40 is disposed at both the left and right positions of the seat 1 and is normally held in a locked state in which the seat back 2 cannot be tilted. And the reclining mechanism 40 will be in the state which can tilt the seat back 2 by switching to a cancellation | release state. In the released state of the reclining mechanism 40, the seat back 2 can be brought down to the seat cushion 3 side to place the seat 1 in the folded posture state (solid line state).
The latter lock mechanisms 50 are respectively disposed at the front and rear positions on the inner side of the vehicle at the lower part of the seat cushion 3, and are normally held engaged and locked to the striker T. In addition, a hinge mechanism (not shown) that supports the seat 1 so that the seat 1 can be rotated up and down with respect to the vehicle floor F is disposed at a position on the vehicle outer side of the seat cushion 3. Accordingly, the seat 1 is configured to be able to be raised toward the outer side of the vehicle when the lock mechanism 50 is switched to the released state. When the seat 1 is raised to the vehicle outer side, the seat back 2 is performed in a folded posture in which the seat back 2 is folded down to the seat cushion 3 side. As a result, the seat 1 in the folded posture can be raised to the vehicle outer side and retracted, and for example, the cargo space can be expanded by the retreating movement of the seat 1.

By the way, the reclining mechanism 40 and the locking mechanism 50 are each switched from the locked state to the released state in accordance with the pulling operation of the release strap US provided to hang down from the back side of the seat back 2. Specifically, when a pulling operation (release operation) of the release strap US is performed, first, only the reclining mechanism 40 is switched to the release state. When the operation of further pulling the release strap US is performed, the lock mechanism 50 is then switched to the release state. Here, the release strap US corresponds to the operation member of the present invention.
In the unlocking operation mechanism of the present embodiment, the tension operation load of the release strap US that can switch both the mechanisms to the release state can be reduced. Hereinafter, each configuration will be described in detail.

First, the configuration of the reclining mechanism 40 will be described. That is, the reclining mechanism 40 includes a rotation shaft 41 that pivotally supports the seatback 2 and a rotation operation integrally connected to the rotation shaft 41, as well shown in FIGS. Member 42. With this configuration, the reclining mechanism 40 is switched between a locked state and a released state in accordance with the turning operation of the turning shaft 41 by the turning operation member 42. Specifically, the reclining mechanism 40 is held in a locked state when the rotation operation member 42 is in the rotation position shown in FIG. Then, the reclining mechanism 40 is switched to the release state by rotating the rotation operation member 42 from the rotation position in FIG. 7 to the release position indicated by the phantom line in FIG. The turning operation member 42 is turned to the upper limit turning position indicated by the solid line in FIG. In a state where the rotation position of the rotation operation member 42 is between the release position (virtual line position) and the upper limit rotation position (solid line position), the reclining mechanism 40 is maintained in a state switched to the release state. The Here, the turning operation member 42 is connected to an unlocking operation mechanism, which will be described later, by a cable Kc connected to the connecting portion 42a of the turning end, and the reclining mechanism is interlocked with the pulling operation of the release strap US. Rotation operation is performed in a direction in which 40 is released (counterclockwise direction shown in FIG. 8).
As well shown in FIG. 13, the reclining mechanism 40 is provided with a spring member (not shown) that urges the seat back 2 in a direction to tilt the seat back 2 toward the seat cushion 3. Therefore, by switching the reclining mechanism 40 to the released state, the seat back 2 can be urged and rotated in the direction in which the seat back 2 is tilted toward the seat cushion 3 side. Here, as well shown in FIG. 9, the reclining mechanism 40 can be rotated even if the release operation for rotating the rotation operation member 42 in the release direction (counterclockwise direction) by the cable Kc is stopped. A free zone is set in which the released state of the reclining mechanism 40 is maintained without returning the member 42 in the locking direction (clockwise direction). This free zone is a rotation area that is not used when an occupant sits on the seat 1, for example, a posture in which the seat back 2 is tilted toward the front side of the vehicle with respect to the seat cushion 3 (see FIG. 13). Is set to the rotation area. Therefore, in the area where the free zone is set, the seat back 2 can be urged and rotated to the seat cushion 3 side even if the release operation by the cable Kc is stopped.
The configuration for setting the free zone and the lock structure (internal structure) for switching the reclining mechanism 40 between the locked state and the released state are disclosed in, for example, JP-A-2002-360368. Since a known configuration is applicable, detailed description is omitted.

Next, the configuration of the lock mechanism 50 will be described. That is, in the lock mechanism 50, as well shown in FIG. 10, a jaw-shaped hook member 51 that can be engaged and locked with the striker T is rotatably connected to a base member 52 that is integral with the seat 1. When the hook member 51 is rotated in the clockwise direction shown in the figure, an opening 51c formed between the upper jaw 51a and the lower jaw 51b is hooked on the striker T, and the striker T Engage lock. In a state where the hook member 51 is engaged and locked to the striker T, the locking portion 51 d formed at the rotating end portion of the hook member 51 is in contact with the rotating end portion 53 a of the claw member 53 connected to the base member 52. Since the hook member 51 is in contact with and locked, the rotation of the hook member 51 in the counterclockwise direction, that is, the rotation in the direction of releasing the engagement lock with the striker T is restricted. That is, in this state, the lock mechanism 50 is held in a state of being engaged and locked with the striker T.
The lock state of the lock mechanism 50 can be switched to the release state by performing the release operation of the release strap US. Specifically, the claw member 53 that can be locked with the locking portion 51 d of the hook member 51 is rotatably connected to the base member 52. The claw member 53 is connected to a lock release operation mechanism, which will be described later, by a cable Kd connected to a connection portion 54a of a rotation operation member 54 that is integrally connected to the claw member 53. In conjunction with this, it is rotated in a direction (counterclockwise direction) for releasing the locked state with the locking portion 51d. Accordingly, the lock mechanism 50 rotates counterclockwise from the rotation position of FIG. 10 to the release position indicated by the phantom line of FIG. 11, that is, the disengagement position where the engagement portion 51d cannot be locked. It is switched to the release state by being operated. Here, the hook member 51 is urged in a rotation direction (counterclockwise direction) for releasing the engagement lock with the striker T by a spring member 55 connected to the claw member 53. Therefore, the hook member 51 is operated to rotate the claw member 53 to the release position, so that the release position indicated by the phantom line in FIG. 11 from the rotation position shown in FIG. That is, it rotates to the position where the engagement lock with the striker T is released. As a result, the lock mechanism 50 is switched to the released state. The claw member 53 can be rotated to an upper limit rotation position indicated by a solid line in the drawing by a rotation operation associated with a pulling operation of the release strap US. In the state where the rotation position of the claw member 53 is between the release position (virtual line position) and the upper limit rotation position (solid line position), the lock mechanism 50 is maintained in a state switched to the release state.
By the way, the claw member 53 is brought into contact with the locking portion 51d of the hook member 51 by the spring member 55 connected to the hook member 51 and the spring member 56 connected to the base member 52. It is urged to rotate clockwise in the direction of contact. Therefore, as well shown in FIG. 12, when the pulling operation of the release strap US is stopped in a state where the lock mechanism 50 is switched to the release state, the claw member 53 is urged and rotated clockwise. The rotating side surface 53 b comes into contact with the locking portion 51 d of the hook member 51. In this contact state, the claw member 53 is in a rotation stopped state in a state in which the hook member 51 is urged to rotate clockwise without restricting the rotation of the hook member 51. From this state, as shown well in FIG. 10, the hook member 51 is rotated clockwise to lock the striker T so that the claw member 53 comes out of the contact state and rotates clockwise. Since it rotates in the direction, the rotation end portion 53a of the claw member 53 can be brought into a locked state in which the engagement portion 51d of the hook member 51 can be engaged. That is, the lock mechanism 50 is rotated in the clockwise direction so that the hook member 51 is engaged and locked with the striker T while being in the released state in the rotation stop state of the claw member 53 shown in FIG. It is in an engagement lockable state that can be switched to the locked state.
The operation of rotating the hook member 51 in the release position in the clockwise direction can be performed by, for example, an operation of pushing the seat 1 toward the vehicle floor F with reference to FIG. That is, when the above pushing operation is performed, the upper jaw 51a of the hook member 51 in the release position comes into contact with the striker T and is further rotated clockwise by the pressing reaction force received from the striker T, as well shown in FIG. Rotate. Thereby, as well shown in FIG. 10, the hook member 51 is hooked on the striker T and hooked.

Next, the configuration of the unlocking operation mechanism will be described.
That is, the unlocking operation mechanism of the present embodiment is arranged inside the structure of the seat cushion 3 as well shown in FIG. The unlocking operation mechanism includes an operation arm 10 that is swung in accordance with a pulling operation of the release strap US, and a first driven arm 20 and a second follower that are swung sequentially by the swung operation arm 10. And a driven arm 30. The operation arm 10, the first driven arm 20, and the second driven arm 30 are formed as plate-shaped link members, and the rotation shafts 11 are parallel to each other with respect to the base member 3 a integrated with the seat cushion 3. , 21 and 31 are rotatably mounted.
Here, the swinging operation of the operation arm 10 by the release strap US is performed via a link member 60 provided in a state of being connected thereto. The link member 60 is rotatably attached to the base member 3a by a rotation shaft 61. A cable Ka connected to the release strap US is connected to the connecting portion 62 at the rotating end of the link member 60. In addition, a cable Kb connected to the operation arm 10 is connected to a connection portion 63 between the rotation end portion and the rotation shaft 61. Here, the cable Kb corresponds to the operation cable of the present invention. That is, in the connecting structure of the two cables Ka and Kb, a lever is configured in which the operation displacement amount of the release strap US with respect to the tensile displacement amount of the cable Kb connected to the operation arm 10 is enlarged. As a result, the pulling operation force necessary for swinging the operation arm 10 is weakened by increasing the operation displacement amount of the release strap US.

As shown well in FIG. 2, the operation arm 10 has a cable Kb connected to a connecting portion 12 of a rotating end portion on the left side in the drawing with respect to the rotating shaft 11. Accordingly, the operation arm 10 swings and rotates in the clockwise direction when the cable Kb is pulled. The operation arm 10 is moved toward the initial position state (the phantom line position state in the figure) before the swing operation is performed by a spring member Sa (torsion spring) disposed between the operation arm 10 and the base member 3a. The rotation is biased, and the rotation is normally stopped in this initial position state. Here, the spring member Sa corresponds to the biasing means of the present invention. Further, the operation arm 10 is a pushing portion 13 in which the turning end on the right side in the drawing with respect to the turning shaft 11 pushes the first driven arm 20 and the second driven arm 30 along with the swing. Yes.
Next, as shown well in FIG. 2, the first driven arm 20 is formed in a shape that is bent in a substantially L shape with the rotation shaft 21 as a node, and is rotated on the upper side in the drawing with respect to the rotation shaft 21. The cable Kc is connected to the connecting portion 23 of the moving end portion. As shown well in FIG. 7, the cable Kc is connected to the connecting portion 42a of the rotation operation member 42 in the reclining mechanism 40 described above, and the counterclockwise direction of the first driven arm 20 (see FIG. 2). The reclining mechanism 40 can be switched to the released state by being pulled along with the swinging motion. Further, as well shown in FIG. 2, the first driven arm 20 is in the initial position state before the swing operation is performed by the spring member Sb (torsion spring) disposed between the first driven arm 20 and the base member 3a. The rotation is biased toward (the position state shown in the figure), and the rotation is always stopped in this initial position state. In the first driven arm 20, a rotation end portion on the left side in the drawing with respect to the rotation shaft 21 is a pushed portion 22 that is pushed by the swinging operation arm 10. Here, the spring member Sb corresponds to the biasing means of the present invention. The turning biasing force of the spring member Sb is set smaller than the turning biasing force of the spring member Sa provided on the operation arm 10.
Next, as shown in FIG. 2, the second driven arm 30 is formed in a shape that is bent in a substantially L shape with the pivot shaft 31 as a node. A cable Kd is connected to the connecting portion 33 of the rotating end. As shown well in FIG. 10, the cable Kd is connected to the connecting portion 54a of the rotation operation member 54 in the locking mechanism 50 described above, and the counterclockwise direction of the second driven arm 30 (see FIG. 2). The lock mechanism 50 can be switched to the released state by being pulled along with the swinging motion. Further, as well shown in FIG. 2, the second driven arm 30 is in an initial position state before the swinging operation is performed by a spring member Sc (torsion spring) disposed between the second driven arm 30 and the base member 3a. The rotation is biased toward (the position state shown in the figure), and the rotation is normally stopped in this initial position state. In the second driven arm 30, the rotation end portion on the left side in the drawing with respect to the rotation shaft 31 is a driven portion 32 that is pressed by the swinging operation arm 10.

Therefore, as shown by the solid line in FIG. 2, when the pulling operation of the cable Kb is performed, the operation arm 10 swings in the clockwise direction from the rotation position indicated by the phantom line in FIG. It contacts the driven part 22 of the driven arm 20. Then, as indicated by the phantom line in FIG. 3, the operation arm 10 pushes the first driven arm 20 by further swinging clockwise from the rotation position indicated by the solid line in FIG. Swing counterclockwise. As a result, the cable Kc is pulled as the first driven arm 20 swings in the counterclockwise direction, and the rotation operation member 42 is released in the release direction (counterclockwise direction) as shown by the phantom line in FIG. ), The reclining mechanism 40 is switched to the released state. As a result, as shown in FIG. 13, the seat back 2 is urged and rotated in a direction in which the seat back 2 is brought down to the seat cushion 3 side.
Then, as indicated by the solid line in FIG. 3, the first driven arm 20 is further rotated counterclockwise by further swinging the operating arm 10 in the clockwise direction from the rotational position indicated by the phantom line in FIG. It is pushed in the direction and swings, and as shown by the solid line in FIG. 8, the rotation operation member 42 is rotated to the upper limit rotation position. Then, as shown by the solid line in FIG. 4, when the operation arm 10 further swings in the clockwise direction from the rotation position (the phantom line position in FIG. 4) shown by the solid line in FIG. 1 The contact state by pushing with the driven arm 20 is removed. As a result, the first driven arm 20 is swung clockwise by the rotation biasing action of the spring member Sb, and returned to the initial position state (solid line position state) before being pushed by the operation arm 10. At this time, the pushing position relationship between the operation arm 10 and the first driven arm 20 is reversed.
Further, at this time, the swing angle position (the phantom line position in FIG. 3) where the first driven arm 20 switches the reclining mechanism 40 to the released state and the swing state where the contact state by the pushing with the operation arm 10 is removed. When it is between the moving angle position (the phantom line position in FIG. 4), the seat back 2 is in a state where it can be moved to the side of the seat cushion 3 as shown in FIG. . That is, when the operation arm 10 is in the position during which the play is set (swing angle region), the reclining mechanism 40 is maintained in the released state, so that the seat back 2 is folded to the seat cushion 3 side and folded. It can be in a posture state. Alternatively, the operation state of the reclining mechanism 40 can be switched to the state in the free zone by tilting and moving the seat back 2 toward the seat cushion 3 side. In this case, the cable Kc that has been pulled by the first driven arm 20 is returned to the initial position state by the first driven arm 20 so that the rotation operation member 42 is moved as shown in FIG. Since it is not returned in the locking direction (clockwise direction), it is in a relaxed state. The reclining mechanism 40 is in a state in which the turning operation member 42 can be returned to the locking direction by coming out of the free zone by changing the tilt angle position of the seat back 2. Thereby, the reclining mechanism 40 can be switched to a locked state.

Then, as shown by the solid line in FIG. 5, the operation arm 10 is further swung clockwise from the rotation position (solid line position in FIG. 4) shown by the phantom line in FIG. The arm 30 abuts on the driven part 32 of the arm 30. Then, as indicated by the phantom line in FIG. 6, the operation arm 10 pushes the second driven arm 30 by further swinging clockwise from the rotation position indicated by the solid line in FIG. 5. Swing counterclockwise. As a result, the cable Kd is pulled as the second driven arm 30 swings in the counterclockwise direction, and as shown by the phantom line in FIG. The lock mechanism 50 is switched to the released state by being rotated counterclockwise.
Then, as shown by the solid line in FIG. 6, the second follower arm 30 is further rotated counterclockwise by further swinging the operating arm 10 in the clockwise direction from the rotational position shown by the phantom line in FIG. It is pushed and swung in the direction, and the rotation operation member 54 is rotated to the upper limit rotation position as shown by the solid line in FIG.

The reclining mechanism 40 and the lock mechanism 50 can be switched to the released state by the series of operations described above. In any of the above operation processes, as shown in FIG. 2, the operation arm 10, the first driven arm 20 and the second driven arm 30 are moved by stopping the pulling operation of the release strap US. , It is possible to return to the initial position state before each operation.
That is, for example, as shown by the solid line in FIG. 4, when the pulling operation of the release strap US is stopped in a state where the pushing position relationship between the operation arm 10 and the first driven arm 20 is reversed, the operation arm 10 is The member Sa is rotated counterclockwise by the rotation biasing action of the member Sa. As a result, the operating arm 10 contacts the first driven arm 20 from the opposite direction, but overcomes the rotational biasing action of the spring member Sb provided on the first driven arm 20 and makes contact with the first driven arm 20. It returns to the initial position state before contact (virtual line position state in FIG. 2).
Further, as well shown in FIG. 6, even if the pulling operation of the release strap US is stopped in a state where the lock mechanism 50 is switched to the release state, the operation arm 10, the first driven arm 20 and the second driven arm are similarly provided. 30 can be returned to the initial position. At this time, the cable Kd pulled by the second driven arm 30 can be engaged and locked by the lock mechanism 50 as shown in FIG. 12 by returning the second driven arm 30 to the initial position. Maintained as a relaxed state.

Subsequently, a method of using the present embodiment will be described.
For example, as shown by the phantom line in FIG. 13, when the release strap US is pulled in a state where the seat 1 is in a use position where an occupant can be seated, first, the reclining mechanism 40 is switched to the release state. As a result, the seat back 2 is urged and rotated in a direction in which the seat back 2 is brought down to the seat cushion 3 side. At this time, the operation state of the release strap US is, for example, as shown well in FIG. 3, by stopping the operation state of the release strap US in the position where the cable Kc is pulled and held, as shown in FIG. The back 2 can be rotated to a position where it is folded to the seat cushion 3 side. It should be noted that it is sufficient to stop the above operation state until at least the reclining mechanism 40 enters the free zone. Further, by stopping the pulling operation of the release strap US when the seat back 2 is folded to the seat cushion 3 side as described above, the seat 1 is kept in a halfway state on the vehicle floor F. I can keep it.
Then, by further pulling the release strap US from the position where the reclining mechanism 40 is switched to the released state, the lock mechanism 50 is then switched to the released state. Therefore, the seat 1 in the folded posture can be raised toward the outer side of the vehicle. Thereby, the luggage space can be expanded with the seat 1 in the stored state.

  Thus, according to the unlocking operation mechanism of the present embodiment, the operation arm 10 is brought into contact with the first driven arm 20 and the second driven arm 30 in order by performing a pulling operation of one release strap US. And both the reclining mechanism 40 and the lock mechanism 50 can be switched to the released state. That is, since the first driven arm 20 and the second driven arm 30 can be sequentially pushed separately by the operating arm 10 without being pushed all at once, the operating force required for the release strap US can be reduced. it can. Furthermore, the pulling operation by the release strap US can be used to keep the seat 1 in the folded posture on the vehicle floor F, and the functions can be properly used. Furthermore, since the play that can maintain the release state of the reclining mechanism 40 is set in the contact structure between the operation arm 10 and the first driven arm 20, for example, the operation is performed before the reclining mechanism 40 is switched to the release state. It is possible to prevent a malfunction such that the contact state between the arm 10 and the first driven arm 20 is released. Furthermore, in the pulling operation of the release strap US, it is easy to create a state where only the reclining mechanism 40 is switched to the released state, and it is also easy to perform an operation of holding the reclining mechanism 40 so as not to return to the locked state. Furthermore, since the connection between the release strap US and the operation arm 10 is performed via a lever using the link member 60, the operation force required for the pulling operation of the release strap US can be further reduced. Furthermore, the seat back 2 can be seated even if the first driven arm 20 is not held at the swing angle position where the reclining mechanism 40 is switched to the released state by the operation of the release strap US by the free zone set in the reclining mechanism 40. The operation of tilting toward the cushion 3 can be easily performed.

Although the embodiment of the present invention has been described with one example, the present invention can be implemented in various forms in addition to the above example.
For example, the arrangement position of the unlocking operation mechanism is not limited to the position shown in the above embodiment, and can be set to an appropriate position according to various sheet structures.
Further, the operating arm may be swung to a rotational position where the pushing position relationship with the second driven arm is reversed by a pulling operation of the release strap. However, in this case, when the pulling operation of the release strap is stopped, in order to return the operation arm to the state before the reverse of the pushing position relationship, for example, a spring member provided in the second driven arm is used. It is necessary to take measures such as setting the rotational biasing force to be smaller than the rotational biasing force of the spring member provided on the operation arm.
Moreover, the structure by which the play for maintaining the cancellation | release state of a reclining mechanism is not set to the contact structure of an operation arm and a 1st driven arm may be sufficient. In this case, the pulling operation of the release strap makes it difficult to create an operation in which only the reclining mechanism is switched to the released state or to keep the reclining mechanism from being returned to the locked state. It is necessary to pay attention to.
In addition, the lever for reducing the operating force required for the pulling operation of the release strap may not be provided, but in this case, the operation force is reduced instead of reducing the amount of the pulling operation of the release strap. It should be noted that it becomes heavy.
Also, the biasing means for biasing the operation arm and the first and second driven arms is not limited to the torsion spring, and various types such as a tension spring can be applied.

It is the schematic diagram showing schematic structure of the unlocking operation mechanism of the vehicle seat. It is the schematic diagram which expanded and represented the A section of FIG. FIG. 3 is a schematic diagram illustrating a state where the first driven arm is pushed by the operation arm and pivoted from the state of FIG. 2. FIG. 4 is a schematic diagram illustrating a state in which the contact state with the first driven arm due to the push of the operation arm is removed from the state of FIG. 3. FIG. 5 is a schematic diagram illustrating a state in which the operation arm is in contact with a second driven arm from the state of FIG. 4. It is the schematic diagram showing the state which the 2nd follower arm was pushed by the operation arm and rocked | swiveled from the state of FIG. It is a side view showing the schematic structure of the reclining mechanism. FIG. 4 is a side view showing an operating state of the reclining mechanism corresponding to FIG. 3. FIG. 5 is a side view showing an operating state of the reclining mechanism corresponding to FIG. 4. It is a side view showing schematic structure of a lock mechanism. It is a side view showing the operating state of the lock mechanism corresponding to FIG. It is a side view showing the lockable state of a lock mechanism. It is a side view showing the state by which the sheet | seat was made into the folding attitude | position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat 2 Seat back 3 Seat cushion 3a Base member 10 Operation arm 11 Rotating shaft 12 Connection part 13 Pushing part 20 1st driven arm 21 Rotating shaft 22 Driven part 23 Connection part 30 2nd driven arm 31 Rotation Shaft 32 Driven portion 33 Connecting portion 40 Reclining mechanism 41 Rotating shaft 42 Rotating operation member 42a Connecting portion 50 Locking mechanism 51 Hook member 51a Upper jaw 51b Lower jaw 51c Opening 51d Locking portion 52 Base member 53 Claw member 53a Rotating end Portion 53b Rotating side surface 54 Rotating operation member 54a Connection part 55 Spring member 56 Spring member 60 Link member 61 Rotating shaft 62 Connection part 63 Connection part US Release strap (operation member)
F floor T striker (engagement member)
Sa spring member (biasing means)
Sb Spring member (biasing means)
Sc Spring member Ka cable Kb cable (operation cable)
Kc cable Kd cable

Claims (3)

A vehicle seat includes a reclining mechanism for adjusting an inclination angle of a seat back serving as a backrest portion, and a lock mechanism for engaging and locking the seat with an engagement member installed on the vehicle floor. A mechanism for unlocking the vehicle seat that can be switched to a released state by an operation associated with a series of releasing operations of one operating member.
An operating arm that swings in response to a release operation of the operating member, a first driven arm that is pushed by the swinging operating arm and swings to switch the reclining mechanism to a released state, and the first driven arm A second driven arm that is pushed by the swinging operation arm separately from the arm and swings to switch the lock mechanism to a released state;
The second driven arm reaches an angular position where the swing angle of the operation arm in the swing rotation direction accompanying the release operation of the operation member deviates from the contact state due to the pushing to the first follower arm. Accordingly, the vehicle seat unlocking operation mechanism is arranged so as to be pushed in contact with the operation arm. The vehicle seat unlocking operation mechanism according to claim 1,
The operating arm is urged to rotate by an urging means that urges the operating arm toward an initial position before the operation member is released, and is stopped in the initial position. And
The first driven arm is rotated by an urging means for urging the first driven arm toward the initial position before being pushed by the operation arm when the contact with the swinging operation arm is released. It is energized and is in a rotation stop state in the initial position state,
The vehicle seat unlocking operation mechanism according to claim 1, wherein an urging force by which the operation arm is rotationally urged is greater than an urging force by which the first driven arm is rotationally urged. The vehicle seat unlocking operation mechanism according to claim 1 or 2,
A region that keeps the reclining mechanism in the released state between a swing angle position at which the reclining mechanism of the first driven arm is switched to the released state and a swing angle position at which the contact state by the pushing of the operation arm is released. The vehicle seat unlocking operation mechanism is characterized in that is set.

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